Feature-Enhanced Visualization of 3D Point Clouds of Cultural Heritage in Transparent Virtual Reality

A transparent virtual reality (VR) visualization system significantly enhances the structural analysis of 3D point clouds from historic architecture, addressing limitations in conventional VR rendering. The study, focusing on Tamaki Shrine—a UNESCO World Heritage site—demonstrates that combining feature enhancement with opacity control improves visibility of internal depth relationships and point-density variations, particularly in complex wooden structures. Researchers achieved this by processing large-scale point cloud data using Poisson disk sampling for real-time optimization, followed by principal component analysis (PCA) to quantify structural salience. A custom alpha-blending shader in Unity enabled two visualization modes: binarization for sharp edges and opacity gradation for soft-edge regions. Tested with a Meta Quest Pro, the system offers distinct viewing modes that facilitate deeper structural understanding than traditional rendering methods.

Matsuo, T., Takatori, S., Li, L., & Tanaka, S. (2026). Feature-Enhanced Visualization of 3D Point Clouds of Cultural Heritage in Transparent Virtual Reality. The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, XLIX-B4-2026, 753–758. https://doi.org/10.5194/isprs-archives-xlix-b4-2026-753-2026